Hydraulic damper and artificial joint containing the same
CA 1231204 A · Owner: Otto Bock Orthopadische Industrie Kg · Inventors: Glabiszewski, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, The invention provides a hydraulic damper particu-, larly for damping the movements of artificial joints comprising: a hollow cylinder closed at one end; a hollow main piston in said cylinder slidable therein between extended and retracted positions; and defining an annular chamber for hydraulic fluid between the piston and the cylinder; an annular collar located on the piston dividing the annular chamber into two variable-volume chambers one on each side of the collar; a hollow throttle piston slidably located within the main piston and defining an equalization chamber between the throttle piston and the main piston, the throttle piston having a bevelled wall forming one end of …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 12, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.